EP0490089A2 - Compresseur frigorifique à dispositif de commande électronique - Google Patents
Compresseur frigorifique à dispositif de commande électronique Download PDFInfo
- Publication number
- EP0490089A2 EP0490089A2 EP91119134A EP91119134A EP0490089A2 EP 0490089 A2 EP0490089 A2 EP 0490089A2 EP 91119134 A EP91119134 A EP 91119134A EP 91119134 A EP91119134 A EP 91119134A EP 0490089 A2 EP0490089 A2 EP 0490089A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressor
- motor
- control arrangement
- overall efficiency
- hermetic reciprocating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1073—Adaptations or arrangements of distribution members the members being reed valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/025—Motor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0253—Compressor control by controlling speed with variable speed
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Definitions
- This invention relates to an improved refrigeration compressor with electronic control arrangement, in particular a reciprocating, hermetic-type compressor for domestic refrigerators and freezers.
- this type of compressors is provided with an electric induction motor operating under an on-off type of control at such rotation speed rates as determined by the existing electric line frequency, ie. 50 Hz or 60 Hz.
- the refrigerating capacity is therefore determined mainly by the displacement, ie. swept volume, of the compressor. Furthermore, it should be noticed that, even when adding a running capacitor, the efficiency of an induction motor does not exceed a value of 0.8.
- the improved compressor with electronic control arrangement according to this invention can be used in association with any refrigerating circuit, thereby enabling the overall efficiency rating to improve, the noise to be reduced and the energy consumption to be considerably decreased.
- the refrigerating circuit which is schematically shown by way of example in Figure 1 comprises a compressor 10, a condenser 11, a collector 12 For the liquid refrigerant fluid, a filter-dehydrator 13, an expansion valve 14, and two evaporators 15 and 16, connected in series, for the frozen-food compartment and the fresh-food compartment, respectively.
- the compressor 10 is driven by a motor 17 of the brushless type, which is controlled by a frequency control arrangement 18 of a generally known type.
- Said frequency control arrangement 18 is connected with a temperature sensor 19, preferably a thermistor, which senses the temperature of the evaporator 16 of the fresh-food compartment. Furthermore, said frequency control arrangement 18 comprises a microprocessor adapted to set, in a preferable way, two different operating frequencies, ie. a lower frequency corresponding to the highest overall efficiency of the compressor for the operation of the refrigeration appliance under normal refrigeration capacity demand conditions, and a higher frequency for the operation of the appliance under increased refrigeration capacity demand conditions, in particular when the need arises to freeze a considerably large amount of food in the frozen-food compartment.
- the invention covers therefore the proposal of utilizing, for a compressor of a given refrigerating capacity, a larger displacement and a motor of the brushless type tuned on a lower frequency than the usual 50-Hz or 60-Hz mains frequency, in such a way that the overall compressor efficiency (COP) is increased and the compressor noise is reduced.
- COP overall compressor efficiency
- a further known fact is the improvement of the volumetric efficiency of a compressor with the decrease of the RPM, ie. the rotation speed of the motor, since this volumetric efficiency mainly depends on the clearance volume at the top dead center, the heating up of the suction gas, the blow-by losses and the opening and closing lags of the valves.
- said opening and closing lags of the valves are much less influential at the lower frequencies since they occur at a lesser rate.
- volumetric efficiency can be improved through a reduction in both the clearance or passive volume and the load losses by correspondingly sizing the passage cross-section of the delivery and suction bores in the plate of the valves, while keeping flow rates unaltered.
- Figure 2 shows the curve relating to the overall efficiency coefficient (COP) of a compressor versus the displacement volume (cc) of the same compressor. Quite similar is on the other hand the profile of the curve relating to the overall efficiency coefficient (COP) versus the capacity for a given compressor.
- COP overall efficiency coefficient
- Figure 3 shows the curves of the volumetric efficiency ( ⁇ 1) and the efficiency relating to the load losses through the discharge bore in the valve plate ( ⁇ 2) versus the bore diameter ( ⁇ ), for compressors having different displacement ratings and driven at different motor RPMs. It is a known fact, and it also ensues from the configuration of the curves shown in the Figures, that the two afore mentioned types of efficiency have contrasting characteristics, ie. progress in a contrasting way, so that the optimum sizing of the bore diameter has to be selected in correspondence of the highest value of the product of the two afore mentioned efficiencies. In particular, this generally occurs in correspondence of the point at which the two curves relating to the characteristic data (ie. displacement and RPM) for each compressor meet.
- the characteristic data ie. displacement and RPM
- Figure 4 shows the curve of the overall efficiency coefficient (COP) of a compressor versus the motor RPM, from which it clearly emerges that the efficiency reaches its highest value in correspondence of a well-defined motor RPM.
- COP overall efficiency coefficient
- Figure 5 finally is a three-dimensional diagram showing the curves obtained experimentally in view of optimizing a compressor according to the invention, in order to determine the highest attainable efficiency versus the motor RPM and the diameter of the bore of the discharge or delivery valve.
- Figure 6 shows the partial cross-section of a hermetic reciprocating compressor, in which a number of components, ie. the cylinder-piston assembly 21, the valve plate 22, the valve 23, the delivery or discharge bore 24 and the muffle 25, are illustrated in detail.
- Compressor A Motor rotation speed (RPM) 2875 rpm Refrigerating capacity 74.8 Kcal/hr Power input rating 94.5 W COP 0.92
- Compressor B Motor rotation speed (RPM) 2870 rpm Refrigerating capacity 57.2 Kcal/hr Power input rating 71.0 W COP 0.88
- Compressor A modified according to the invention Motor rotation speed (RPM) 2100 rpm Refrigerating capacity 56.0 Kcal/hr Power input rating 58.0 W COP 1.12
- the reduction in the motor RPM ie. from 2875 to 2100 rpm causes the flow rate to decrease accordingly, so that it will be possible and appropriate to downsize the diameter of the bores of the valves.
- the COP achieved in this way is as high as 1.25, which means a 42-percent increase over the COP of the original compressor B equipped with standard induction motor.
- valve plate undergoes an optimization process in accordance with the lower motor RPM, it ensues that, with delivery and suction bores having a diameter of 2.5 mm each (instead of two bores with a diameter of 3.2 mm each), the refrigerating capacity becomes 86 Kcal/hr (ie. practically equivalent to the capacity of the unmodified compressor), while the COP jumps to 1.33 with an increase of 29.1 percent.
- the compressor with brushless-type motor with electronic frequency control according to the invention actually achieves the scopes and the purposes of the invention by enhancing the efficiency, lowering the noise and reducing the energy consumption in a very effective way.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Compressor (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT4577690 | 1990-12-11 | ||
IT04577690A IT1247635B (it) | 1990-12-11 | 1990-12-11 | Perfezionamento nei motocompressori frigoriferi con controllo elettronico |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0490089A2 true EP0490089A2 (fr) | 1992-06-17 |
EP0490089A3 EP0490089A3 (fr) | 1994-03-23 |
EP0490089B1 EP0490089B1 (fr) | 1996-09-04 |
Family
ID=11258153
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91119134A Expired - Lifetime EP0490089B1 (fr) | 1990-12-11 | 1991-11-11 | Compresseur frigorifique à dispositif de commande électronique |
Country Status (7)
Country | Link |
---|---|
US (1) | US5282723A (fr) |
EP (1) | EP0490089B1 (fr) |
AT (1) | ATE142312T1 (fr) |
DE (1) | DE69121856T2 (fr) |
DK (1) | DK0490089T3 (fr) |
ES (1) | ES2095284T3 (fr) |
IT (1) | IT1247635B (fr) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995015468A1 (fr) * | 1993-12-01 | 1995-06-08 | Zanussi Elettromeccanica S.P.A. | Amelioration du dispositif de commande electronique des compresseurs de refrigeration mus par un moteur |
DE19509914C1 (de) * | 1995-03-18 | 1996-11-07 | Danfoss As | Verfahren zum Betrieb einer Motor-Verdichter-Einheit und Motor-Verdichter-Einheit zur Durchführung dieses Verfahrens |
WO1998002697A1 (fr) | 1996-07-16 | 1998-01-22 | Zanussi Elettromeccanica S.P.A. | Ameliorations concernant les circuits de refrigeration d'appareils menagers de refrigeration par compression de vapeur et d'appareils similaires |
WO2000079188A1 (fr) | 1999-06-22 | 2000-12-28 | Zanussi Elettromeccanica S.P.A. | Compresseur refrigerant entraine par un moteur a frequence d'alimentation variable |
EP1215454A2 (fr) * | 2000-12-13 | 2002-06-19 | Magnetek S.p.A. | Procédé de réduction de la consommation d'énergie d'une machine frigorifique et machine frigorifique fonctionnant suivant ce procédé |
WO2014095859A1 (fr) * | 2012-12-20 | 2014-06-26 | Siemens Aktiengesellschaft | Dispositif de production de pression d'air pour véhicule ferroviaire |
US9890982B2 (en) | 2008-08-07 | 2018-02-13 | Carrier Corporation | Discrete frequency operation for unit capacity control |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5423192A (en) * | 1993-08-18 | 1995-06-13 | General Electric Company | Electronically commutated motor for driving a compressor |
US5506487A (en) * | 1991-03-28 | 1996-04-09 | General Electric Company | Systems and methods for driving a compressor with a motor |
US6112535A (en) * | 1995-04-25 | 2000-09-05 | General Electric Company | Compressor including a motor and motor control in the compressor housing and method of manufacture |
US5675231A (en) * | 1996-05-15 | 1997-10-07 | General Electric Company | Systems and methods for protecting a single phase motor from circulating currents |
ES2169660B1 (es) * | 2000-04-18 | 2003-11-01 | Bsh Balay Sa | Aparato electrodomestico, con un motor sincrono. |
US7716937B2 (en) * | 2005-03-17 | 2010-05-18 | Electrolux Home Products, Inc. | Electronic refrigeration control system including a variable speed compressor |
US8181472B2 (en) * | 2005-03-17 | 2012-05-22 | Electrolux Home Products, Inc. | Electronic refrigeration control system |
EP1990591A1 (fr) | 2007-05-08 | 2008-11-12 | Sorgenia S.P.A. | Dispositif indépendant et universel pour contrôler la vitesse de compresseurs motorisés d'appareils domestiques réfrigérant et leur procédé de contrôle |
KR101974360B1 (ko) * | 2012-07-06 | 2019-05-03 | 삼성전자주식회사 | 냉장고 |
US20140230463A1 (en) * | 2013-02-15 | 2014-08-21 | GM Global Technology Operations LLC | Method for controlling a compressor of a thermal storage heat pump system |
CN105508195A (zh) * | 2016-01-21 | 2016-04-20 | 浙江商业机械厂有限公司 | 半封闭制冷压缩机 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4207510A (en) * | 1978-01-16 | 1980-06-10 | Sri International | Control method and means for efficient operation of brushless d-c motors over a wide range of operating conditions |
EP0109519A1 (fr) * | 1982-10-23 | 1984-05-30 | Ernst Gaus | Moteur asynchrone triphasé |
GB2133586A (en) * | 1982-12-27 | 1984-07-25 | Samsung Electronics Co Ltd | Temperature control of a refrigerator |
EP0250008A1 (fr) * | 1986-04-09 | 1987-12-23 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Procédé et appareil pour diviser par deux la vitesse d'un moteur électrique |
GB2229295A (en) * | 1989-01-06 | 1990-09-19 | Peter Keith Jackson | Air conditioning system |
US5023531A (en) * | 1988-05-19 | 1991-06-11 | Arx, Inc. | Dual hybrid demand refrigeration control apparatus |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3499297A (en) * | 1969-02-20 | 1970-03-10 | John D Ruff | Variable capacity refrigeration system |
JPS59131843A (ja) * | 1983-01-17 | 1984-07-28 | Toshiba Corp | 空気調和装置 |
JPS5956647A (ja) * | 1983-06-06 | 1984-04-02 | Hitachi Ltd | 空気調和装置 |
US4720981A (en) * | 1986-12-23 | 1988-01-26 | American Standard Inc. | Cooling of air conditioning control electronics |
US5048302A (en) * | 1990-02-09 | 1991-09-17 | Hudson Associates, Inc. | Refrigerant system having controlled variable speed drive for compressor |
US5129234A (en) * | 1991-01-14 | 1992-07-14 | Lennox Industries Inc. | Humidity control for regulating compressor speed |
-
1990
- 1990-12-11 IT IT04577690A patent/IT1247635B/it active IP Right Grant
-
1991
- 1991-11-11 ES ES91119134T patent/ES2095284T3/es not_active Expired - Lifetime
- 1991-11-11 AT AT91119134T patent/ATE142312T1/de not_active IP Right Cessation
- 1991-11-11 DK DK91119134.4T patent/DK0490089T3/da active
- 1991-11-11 EP EP91119134A patent/EP0490089B1/fr not_active Expired - Lifetime
- 1991-11-11 DE DE69121856T patent/DE69121856T2/de not_active Expired - Fee Related
- 1991-12-05 US US07/802,557 patent/US5282723A/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4207510A (en) * | 1978-01-16 | 1980-06-10 | Sri International | Control method and means for efficient operation of brushless d-c motors over a wide range of operating conditions |
EP0109519A1 (fr) * | 1982-10-23 | 1984-05-30 | Ernst Gaus | Moteur asynchrone triphasé |
GB2133586A (en) * | 1982-12-27 | 1984-07-25 | Samsung Electronics Co Ltd | Temperature control of a refrigerator |
EP0250008A1 (fr) * | 1986-04-09 | 1987-12-23 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Procédé et appareil pour diviser par deux la vitesse d'un moteur électrique |
US5023531A (en) * | 1988-05-19 | 1991-06-11 | Arx, Inc. | Dual hybrid demand refrigeration control apparatus |
GB2229295A (en) * | 1989-01-06 | 1990-09-19 | Peter Keith Jackson | Air conditioning system |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995015468A1 (fr) * | 1993-12-01 | 1995-06-08 | Zanussi Elettromeccanica S.P.A. | Amelioration du dispositif de commande electronique des compresseurs de refrigeration mus par un moteur |
DE19509914C1 (de) * | 1995-03-18 | 1996-11-07 | Danfoss As | Verfahren zum Betrieb einer Motor-Verdichter-Einheit und Motor-Verdichter-Einheit zur Durchführung dieses Verfahrens |
WO1998002697A1 (fr) | 1996-07-16 | 1998-01-22 | Zanussi Elettromeccanica S.P.A. | Ameliorations concernant les circuits de refrigeration d'appareils menagers de refrigeration par compression de vapeur et d'appareils similaires |
WO2000079188A1 (fr) | 1999-06-22 | 2000-12-28 | Zanussi Elettromeccanica S.P.A. | Compresseur refrigerant entraine par un moteur a frequence d'alimentation variable |
EP1215454A2 (fr) * | 2000-12-13 | 2002-06-19 | Magnetek S.p.A. | Procédé de réduction de la consommation d'énergie d'une machine frigorifique et machine frigorifique fonctionnant suivant ce procédé |
EP1215454A3 (fr) * | 2000-12-13 | 2002-09-11 | Magnetek S.p.A. | Procédé de réduction de la consommation d'énergie d'une machine frigorifique et machine frigorifique fonctionnant suivant ce procédé |
US9890982B2 (en) | 2008-08-07 | 2018-02-13 | Carrier Corporation | Discrete frequency operation for unit capacity control |
WO2014095859A1 (fr) * | 2012-12-20 | 2014-06-26 | Siemens Aktiengesellschaft | Dispositif de production de pression d'air pour véhicule ferroviaire |
Also Published As
Publication number | Publication date |
---|---|
IT9045776A0 (it) | 1990-12-11 |
IT1247635B (it) | 1994-12-28 |
EP0490089B1 (fr) | 1996-09-04 |
DK0490089T3 (da) | 1996-10-28 |
IT9045776A1 (it) | 1992-06-11 |
DE69121856T2 (de) | 1997-02-27 |
US5282723A (en) | 1994-02-01 |
ATE142312T1 (de) | 1996-09-15 |
DE69121856D1 (de) | 1996-10-10 |
ES2095284T3 (es) | 1997-02-16 |
EP0490089A3 (fr) | 1994-03-23 |
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